计算2x2y-(12-3xy+y3)的结果是()A.x2y-6x3y2+2x2y3B.x2y-2x2y4C.x2y-6x3y2+2x2y4D.-6x3y2+2x2y4-数学

题目简介

计算2x2y-(12-3xy+y3)的结果是()A.x2y-6x3y2+2x2y3B.x2y-2x2y4C.x2y-6x3y2+2x2y4D.-6x3y2+2x2y4-数学

题目详情

计算2x2y-(
1
2
-3xy+y3)的结果是(  )
A.x2y-6x3y2+2x2y3B.x2y-2x2y4
C.x2y-6x3y2+2x2y4D.-6x3y2+2x2y4
题型:单选题难度:中档来源:不详

答案

原式=2x2y×class="stub"1
2
+2x2y•(-3xy)+2x2y•y3
=x2y-6x3y2+2x2y4,
故选C.

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